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Merge pull request #300 from zed-industries/fix-move-line-panic

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Fix panics when moving lines with block decorations and simplify line boundary detection
This commit is contained in:
Nathan Sobo 2021-12-29 23:47:25 -08:00 committed by GitHub
commit ba75007259
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 303 additions and 279 deletions
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70
crates/editor/src/display_map.rs
View file

@ -200,39 +200,29 @@ impl DisplaySnapshot {
self.buffer_snapshot.max_buffer_row()
}
pub fn prev_row_boundary(&self, input_display_point: DisplayPoint) -> (DisplayPoint, Point) {
let mut display_point = input_display_point;
pub fn prev_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
loop {
*display_point.column_mut() = 0;
let mut point = display_point.to_point(self);
point = self.buffer_snapshot.clip_point(point, Bias::Left);
point.column = 0;
let next_display_point = self.point_to_display_point_with_clipping(point, Bias::Left);
if next_display_point == display_point {
return (display_point, point);
let mut display_point = self.point_to_display_point(point, Bias::Left);
*display_point.column_mut() = 0;
let next_point = self.display_point_to_point(display_point, Bias::Left);
if next_point == point {
return (point, display_point);
}
if next_display_point > display_point {
panic!("invalid display point {:?}", input_display_point);
}
display_point = next_display_point;
point = next_point;
}
}
pub fn next_row_boundary(&self, input_display_point: DisplayPoint) -> (DisplayPoint, Point) {
let mut display_point = input_display_point;
pub fn next_line_boundary(&self, mut point: Point) -> (Point, DisplayPoint) {
loop {
*display_point.column_mut() = self.line_len(display_point.row());
let mut point = self.display_point_to_point(display_point, Bias::Right);
point = self.buffer_snapshot.clip_point(point, Bias::Right);
point.column = self.buffer_snapshot.line_len(point.row);
let next_display_point = self.point_to_display_point(point, Bias::Right);
if next_display_point == display_point {
return (display_point, point);
let mut display_point = self.point_to_display_point(point, Bias::Right);
*display_point.column_mut() = self.line_len(display_point.row());
let next_point = self.display_point_to_point(display_point, Bias::Right);
if next_point == point {
return (point, display_point);
}
if next_display_point < display_point {
panic!("invalid display point {:?}", input_display_point);
}
display_point = next_display_point;
point = next_point;
}
}
@ -244,16 +234,6 @@ impl DisplaySnapshot {
DisplayPoint(block_point)
}
fn point_to_display_point_with_clipping(&self, point: Point, bias: Bias) -> DisplayPoint {
let fold_point = point.to_fold_point(&self.folds_snapshot, bias);
let tab_point = self.tabs_snapshot.to_tab_point(fold_point);
let wrap_point = self
.wraps_snapshot
.from_tab_point_with_clipping(tab_point, bias);
let block_point = self.blocks_snapshot.to_block_point(wrap_point);
DisplayPoint(block_point)
}
fn display_point_to_point(&self, point: DisplayPoint, bias: Bias) -> Point {
let block_point = point.0;
let wrap_point = self.blocks_snapshot.to_wrap_point(block_point);
@ -625,23 +605,21 @@ mod tests {
log::info!("display text: {:?}", snapshot.text());
// Line boundaries
let buffer = &snapshot.buffer_snapshot;
for _ in 0..5 {
let row = rng.gen_range(0..=snapshot.max_point().row());
let column = rng.gen_range(0..=snapshot.line_len(row));
let point = snapshot.clip_point(DisplayPoint::new(row, column), Left);
let row = rng.gen_range(0..=buffer.max_point().row);
let column = rng.gen_range(0..=buffer.line_len(row));
let point = buffer.clip_point(Point::new(row, column), Left);
let (prev_display_bound, prev_buffer_bound) = snapshot.prev_row_boundary(point);
let (next_display_bound, next_buffer_bound) = snapshot.next_row_boundary(point);
let (prev_buffer_bound, prev_display_bound) = snapshot.prev_line_boundary(point);
let (next_buffer_bound, next_display_bound) = snapshot.next_line_boundary(point);
assert!(prev_display_bound <= point);
assert!(next_display_bound >= point);
assert!(prev_buffer_bound <= point);
assert!(next_buffer_bound >= point);
assert_eq!(prev_buffer_bound.column, 0);
assert_eq!(prev_display_bound.column(), 0);
if next_buffer_bound < snapshot.buffer_snapshot.max_point() {
assert_eq!(
snapshot.buffer_snapshot.chars_at(next_buffer_bound).next(),
Some('\n')
);
if next_buffer_bound < buffer.max_point() {
assert_eq!(buffer.chars_at(next_buffer_bound).next(), Some('\n'));
}
assert_eq!(

9
crates/editor/src/display_map/wrap_map.rs
View file

@ -672,15 +672,6 @@ impl WrapSnapshot {
WrapPoint(cursor.start().1 .0 + (point.0 - cursor.start().0 .0))
}
pub fn from_tab_point_with_clipping(&self, point: TabPoint, bias: Bias) -> WrapPoint {
let mut cursor = self.transforms.cursor::<(TabPoint, WrapPoint)>();
cursor.seek(&point, bias, &());
self.clip_point(
WrapPoint(cursor.start().1 .0 + (point.0 - cursor.start().0 .0)),
bias,
)
}
pub fn clip_point(&self, mut point: WrapPoint, bias: Bias) -> WrapPoint {
if bias == Bias::Left {
let mut cursor = self.transforms.cursor::<WrapPoint>();

392
crates/editor/src/editor.rs
View file

@ -284,16 +284,8 @@ trait SelectionExt {
fn offset_range(&self, buffer: &MultiBufferSnapshot) -> Range<usize>;
fn point_range(&self, buffer: &MultiBufferSnapshot) -> Range<Point>;
fn display_range(&self, map: &DisplaySnapshot) -> Range<DisplayPoint>;
fn spanned_rows(
&self,
include_end_if_at_line_start: bool,
map: &DisplaySnapshot,
) -> SpannedRows;
}
struct SpannedRows {
buffer_rows: Range<u32>,
display_rows: Range<u32>,
fn spanned_rows(&self, include_end_if_at_line_start: bool, map: &DisplaySnapshot)
-> Range<u32>;
}
#[derive(Clone, Debug)]
@ -1577,12 +1569,12 @@ impl Editor {
let mut edit_ranges = Vec::new();
let mut selections = selections.iter().peekable();
while let Some(selection) = selections.next() {
let mut rows = selection.spanned_rows(false, &display_map).buffer_rows;
let mut rows = selection.spanned_rows(false, &display_map);
let goal_display_column = selection.head().to_display_point(&display_map).column();
// Accumulate contiguous regions of rows that we want to delete.
while let Some(next_selection) = selections.peek() {
let next_rows = next_selection.spanned_rows(false, &display_map).buffer_rows;
let next_rows = next_selection.spanned_rows(false, &display_map);
if next_rows.start <= rows.end {
rows.end = next_rows.end;
selections.next().unwrap();
@ -1645,10 +1637,10 @@ impl Editor {
let mut selections_iter = selections.iter().peekable();
while let Some(selection) = selections_iter.next() {
// Avoid duplicating the same lines twice.
let mut rows = selection.spanned_rows(false, &display_map).buffer_rows;
let mut rows = selection.spanned_rows(false, &display_map);
while let Some(next_selection) = selections_iter.peek() {
let next_rows = next_selection.spanned_rows(false, &display_map).buffer_rows;
let next_rows = next_selection.spanned_rows(false, &display_map);
if next_rows.start <= rows.end - 1 {
rows.end = next_rows.end;
selections_iter.next().unwrap();
@ -1693,179 +1685,191 @@ impl Editor {
}
pub fn move_line_up(&mut self, _: &MoveLineUp, cx: &mut ViewContext<Self>) {
self.start_transaction(cx);
let selections = self.local_selections::<Point>(cx);
let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
let buffer = self.buffer.read(cx).snapshot(cx);
let mut edits = Vec::new();
let mut new_selection_ranges = Vec::new();
let mut old_folds = Vec::new();
let mut new_folds = Vec::new();
let mut unfold_ranges = Vec::new();
let mut refold_ranges = Vec::new();
let selections = self.local_selections::<Point>(cx);
let mut selections = selections.iter().peekable();
let mut contiguous_selections = Vec::new();
let mut contiguous_row_selections = Vec::new();
let mut new_selections = Vec::new();
while let Some(selection) = selections.next() {
// Accumulate contiguous regions of rows that we want to move.
contiguous_selections.push(selection.point_range(&buffer));
let SpannedRows {
mut buffer_rows,
mut display_rows,
} = selection.spanned_rows(false, &display_map);
// Find all the selections that span a contiguous row range
contiguous_row_selections.push(selection.clone());
let start_row = selection.start.row;
let mut end_row = if selection.end.column > 0 || selection.is_empty() {
display_map.next_line_boundary(selection.end).0.row + 1
} else {
selection.end.row
};
while let Some(next_selection) = selections.peek() {
let SpannedRows {
buffer_rows: next_buffer_rows,
display_rows: next_display_rows,
} = next_selection.spanned_rows(false, &display_map);
if next_buffer_rows.start <= buffer_rows.end {
buffer_rows.end = next_buffer_rows.end;
display_rows.end = next_display_rows.end;
contiguous_selections.push(next_selection.point_range(&buffer));
selections.next().unwrap();
if next_selection.start.row <= end_row {
end_row = if next_selection.end.column > 0 || next_selection.is_empty() {
display_map.next_line_boundary(next_selection.end).0.row + 1
} else {
next_selection.end.row
};
contiguous_row_selections.push(selections.next().unwrap().clone());
} else {
break;
}
}
// Cut the text from the selected rows and paste it at the start of the previous line.
if display_rows.start != 0 {
let start = Point::new(buffer_rows.start, 0).to_offset(&buffer);
let end = Point::new(buffer_rows.end - 1, buffer.line_len(buffer_rows.end - 1))
.to_offset(&buffer);
// Move the text spanned by the row range to be before the line preceding the row range
if start_row > 0 {
let range_to_move = Point::new(start_row - 1, buffer.line_len(start_row - 1))
..Point::new(end_row - 1, buffer.line_len(end_row - 1));
let insertion_point = display_map
.prev_line_boundary(Point::new(start_row - 1, 0))
.0;
let prev_row_display_start = DisplayPoint::new(display_rows.start - 1, 0);
let prev_row_buffer_start = display_map.prev_row_boundary(prev_row_display_start).1;
let prev_row_buffer_start_offset = prev_row_buffer_start.to_offset(&buffer);
// Don't move lines across excerpts
if !buffer.range_contains_excerpt_boundary(insertion_point..range_to_move.end) {
let text = buffer
.text_for_range(range_to_move.clone())
.flat_map(|s| s.chars())
.skip(1)
.chain(['\n'])
.collect::<String>();
let mut text = String::new();
text.extend(buffer.text_for_range(start..end));
text.push('\n');
edits.push((
prev_row_buffer_start_offset..prev_row_buffer_start_offset,
text,
));
edits.push((start - 1..end, String::new()));
edits.push((insertion_point..insertion_point, text));
edits.push((range_to_move.clone(), String::new()));
let row_delta = buffer_rows.start - prev_row_buffer_start.row;
let row_delta = range_to_move.start.row - insertion_point.row + 1;
// Move selections up.
for range in &mut contiguous_selections {
range.start.row -= row_delta;
range.end.row -= row_delta;
}
// Move selections up
new_selections.extend(contiguous_row_selections.drain(..).map(
|mut selection| {
selection.start.row -= row_delta;
selection.end.row -= row_delta;
selection
},
));
// Move folds up.
old_folds.push(start..end);
for fold in display_map.folds_in_range(start..end) {
let mut start = fold.start.to_point(&buffer);
let mut end = fold.end.to_point(&buffer);
start.row -= row_delta;
end.row -= row_delta;
new_folds.push(start..end);
// Move folds up
unfold_ranges.push(range_to_move.clone());
for fold in display_map.folds_in_range(
buffer.anchor_before(range_to_move.start)
..buffer.anchor_after(range_to_move.end),
) {
let mut start = fold.start.to_point(&buffer);
let mut end = fold.end.to_point(&buffer);
start.row -= row_delta;
end.row -= row_delta;
refold_ranges.push(start..end);
}
}
}
new_selection_ranges.extend(contiguous_selections.drain(..));
// If we didn't move line(s), preserve the existing selections
new_selections.extend(contiguous_row_selections.drain(..));
}
self.unfold_ranges(old_folds, cx);
self.start_transaction(cx);
self.unfold_ranges(unfold_ranges, cx);
self.buffer.update(cx, |buffer, cx| {
for (range, text) in edits.into_iter().rev() {
buffer.edit(Some(range), text, cx);
buffer.edit([range], text, cx);
}
});
self.fold_ranges(new_folds, cx);
self.select_ranges(new_selection_ranges, Some(Autoscroll::Fit), cx);
self.fold_ranges(refold_ranges, cx);
self.update_selections(new_selections, Some(Autoscroll::Fit), cx);
self.end_transaction(cx);
}
pub fn move_line_down(&mut self, _: &MoveLineDown, cx: &mut ViewContext<Self>) {
self.start_transaction(cx);
let selections = self.local_selections::<Point>(cx);
let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
let buffer = self.buffer.read(cx).snapshot(cx);
let mut edits = Vec::new();
let mut new_selection_ranges = Vec::new();
let mut old_folds = Vec::new();
let mut new_folds = Vec::new();
let mut unfold_ranges = Vec::new();
let mut refold_ranges = Vec::new();
let selections = self.local_selections::<Point>(cx);
let mut selections = selections.iter().peekable();
let mut contiguous_selections = Vec::new();
let mut contiguous_row_selections = Vec::new();
let mut new_selections = Vec::new();
while let Some(selection) = selections.next() {
// Accumulate contiguous regions of rows that we want to move.
contiguous_selections.push(selection.point_range(&buffer));
let SpannedRows {
mut buffer_rows,
mut display_rows,
} = selection.spanned_rows(false, &display_map);
// Find all the selections that span a contiguous row range
contiguous_row_selections.push(selection.clone());
let start_row = selection.start.row;
let mut end_row = if selection.end.column > 0 || selection.is_empty() {
display_map.next_line_boundary(selection.end).0.row + 1
} else {
selection.end.row
};
while let Some(next_selection) = selections.peek() {
let SpannedRows {
buffer_rows: next_buffer_rows,
display_rows: next_display_rows,
} = next_selection.spanned_rows(false, &display_map);
if next_buffer_rows.start <= buffer_rows.end {
buffer_rows.end = next_buffer_rows.end;
display_rows.end = next_display_rows.end;
contiguous_selections.push(next_selection.point_range(&buffer));
selections.next().unwrap();
if next_selection.start.row <= end_row {
end_row = if next_selection.end.column > 0 || next_selection.is_empty() {
display_map.next_line_boundary(next_selection.end).0.row + 1
} else {
next_selection.end.row
};
contiguous_row_selections.push(selections.next().unwrap().clone());
} else {
break;
}
}
// Cut the text from the selected rows and paste it at the end of the next line.
if display_rows.end <= display_map.max_point().row() {
let start = Point::new(buffer_rows.start, 0).to_offset(&buffer);
let end = Point::new(buffer_rows.end - 1, buffer.line_len(buffer_rows.end - 1))
.to_offset(&buffer);
// Move the text spanned by the row range to be after the last line of the row range
if end_row <= buffer.max_point().row {
let range_to_move = Point::new(start_row, 0)..Point::new(end_row, 0);
let insertion_point = display_map.next_line_boundary(Point::new(end_row, 0)).0;
let next_row_display_end =
DisplayPoint::new(display_rows.end, display_map.line_len(display_rows.end));
let next_row_buffer_end = display_map.next_row_boundary(next_row_display_end).1;
let next_row_buffer_end_offset = next_row_buffer_end.to_offset(&buffer);
// Don't move lines across excerpt boundaries
if !buffer.range_contains_excerpt_boundary(range_to_move.start..insertion_point) {
let mut text = String::from("\n");
text.extend(buffer.text_for_range(range_to_move.clone()));
text.pop(); // Drop trailing newline
edits.push((range_to_move.clone(), String::new()));
edits.push((insertion_point..insertion_point, text));
let mut text = String::new();
text.push('\n');
text.extend(buffer.text_for_range(start..end));
edits.push((start..end + 1, String::new()));
edits.push((next_row_buffer_end_offset..next_row_buffer_end_offset, text));
let row_delta = insertion_point.row - range_to_move.end.row + 1;
let row_delta = next_row_buffer_end.row - buffer_rows.end + 1;
// Move selections down
new_selections.extend(contiguous_row_selections.drain(..).map(
|mut selection| {
selection.start.row += row_delta;
selection.end.row += row_delta;
selection
},
));
// Move selections down.
for range in &mut contiguous_selections {
range.start.row += row_delta;
range.end.row += row_delta;
}
// Move folds down.
old_folds.push(start..end);
for fold in display_map.folds_in_range(start..end) {
let mut start = fold.start.to_point(&buffer);
let mut end = fold.end.to_point(&buffer);
start.row += row_delta;
end.row += row_delta;
new_folds.push(start..end);
// Move folds down
unfold_ranges.push(range_to_move.clone());
for fold in display_map.folds_in_range(
buffer.anchor_before(range_to_move.start)
..buffer.anchor_after(range_to_move.end),
) {
let mut start = fold.start.to_point(&buffer);
let mut end = fold.end.to_point(&buffer);
start.row += row_delta;
end.row += row_delta;
refold_ranges.push(start..end);
}
}
}
new_selection_ranges.extend(contiguous_selections.drain(..));
// If we didn't move line(s), preserve the existing selections
new_selections.extend(contiguous_row_selections.drain(..));
}
self.unfold_ranges(old_folds, cx);
self.start_transaction(cx);
self.unfold_ranges(unfold_ranges, cx);
self.buffer.update(cx, |buffer, cx| {
for (range, text) in edits.into_iter().rev() {
buffer.edit(Some(range), text, cx);
buffer.edit([range], text, cx);
}
});
self.fold_ranges(new_folds, cx);
self.select_ranges(new_selection_ranges, Some(Autoscroll::Fit), cx);
self.fold_ranges(refold_ranges, cx);
self.update_selections(new_selections, Some(Autoscroll::Fit), cx);
self.end_transaction(cx);
}
@ -2406,7 +2410,7 @@ impl Editor {
let mut selections = self.local_selections::<Point>(cx);
let max_point = display_map.buffer_snapshot.max_point();
for selection in &mut selections {
let rows = selection.spanned_rows(true, &display_map).buffer_rows;
let rows = selection.spanned_rows(true, &display_map);
selection.start = Point::new(rows.start, 0);
selection.end = cmp::min(max_point, Point::new(rows.end, 0));
selection.reversed = false;
@ -3015,82 +3019,51 @@ impl Editor {
}
}
pub fn visible_selections<'a>(
&'a self,
display_rows: Range<u32>,
cx: &'a mut MutableAppContext,
) -> HashMap<ReplicaId, Vec<Selection<DisplayPoint>>> {
let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
pub fn local_selections_in_range(
&self,
range: Range<Anchor>,
display_map: &DisplaySnapshot,
) -> Vec<Selection<Point>> {
let buffer = &display_map.buffer_snapshot;
let start = if display_rows.start == 0 {
Anchor::min()
} else {
buffer.anchor_before(
DisplayPoint::new(display_rows.start, 0).to_offset(&display_map, Bias::Left),
)
};
let end = if display_rows.end > display_map.max_point().row() {
Anchor::max()
} else {
buffer.anchor_before(
DisplayPoint::new(display_rows.end, 0).to_offset(&display_map, Bias::Right),
)
};
let start_ix = match self
.selections
.binary_search_by(|probe| probe.end.cmp(&start, &buffer).unwrap())
.binary_search_by(|probe| probe.end.cmp(&range.start, &buffer).unwrap())
{
Ok(ix) | Err(ix) => ix,
};
let end_ix = match self
.selections
.binary_search_by(|probe| probe.start.cmp(&end, &buffer).unwrap())
.binary_search_by(|probe| probe.start.cmp(&range.end, &buffer).unwrap())
{
Ok(ix) => ix + 1,
Err(ix) => ix,
};
fn display_selection(
fn point_selection(
selection: &Selection<Anchor>,
display_map: &DisplaySnapshot,
) -> Selection<DisplayPoint> {
buffer: &MultiBufferSnapshot,
) -> Selection<Point> {
let start = selection.start.to_point(&buffer);
let end = selection.end.to_point(&buffer);
Selection {
id: selection.id,
start: selection.start.to_display_point(&display_map),
end: selection.end.to_display_point(&display_map),
start,
end,
reversed: selection.reversed,
goal: selection.goal,
}
}
let mut result = HashMap::default();
result.insert(
self.replica_id(cx),
self.selections[start_ix..end_ix]
.iter()
.chain(
self.pending_selection
.as_ref()
.map(|pending| &pending.selection),
)
.map(|s| display_selection(s, &display_map))
.collect(),
);
for (replica_id, selection) in display_map
.buffer_snapshot
.remote_selections_in_range(&(start..end))
{
result
.entry(replica_id)
.or_insert(Vec::new())
.push(display_selection(&selection, &display_map));
}
result
self.selections[start_ix..end_ix]
.iter()
.chain(
self.pending_selection
.as_ref()
.map(|pending| &pending.selection),
)
.map(|s| point_selection(s, &buffer))
.collect()
}
pub fn local_selections<'a, D>(&self, cx: &'a AppContext) -> Vec<Selection<D>>
@ -3779,30 +3752,20 @@ impl<T: ToPoint + ToOffset> SelectionExt for Selection<T> {
&self,
include_end_if_at_line_start: bool,
map: &DisplaySnapshot,
) -> SpannedRows {
let display_start = self
.start
.to_point(&map.buffer_snapshot)
.to_display_point(map);
let mut display_end = self
.end
.to_point(&map.buffer_snapshot)
.to_display_point(map);
) -> Range<u32> {
let start = self.start.to_point(&map.buffer_snapshot);
let mut end = self.end.to_point(&map.buffer_snapshot);
if !include_end_if_at_line_start
&& display_end.row() != map.max_point().row()
&& display_start.row() != display_end.row()
&& display_end.column() == 0
&& end.row != map.buffer_snapshot.max_point().row
&& start.row != end.row
&& end.column == 0
{
*display_end.row_mut() -= 1;
end.row -= 1;
}
let (display_start, buffer_start) = map.prev_row_boundary(display_start);
let (display_end, buffer_end) = map.next_row_boundary(display_end);
SpannedRows {
buffer_rows: buffer_start.row..buffer_end.row + 1,
display_rows: display_start.row()..display_end.row() + 1,
}
let buffer_start = map.prev_line_boundary(start).0;
let buffer_end = map.next_line_boundary(end).0;
buffer_start.row..buffer_end.row + 1
}
}
@ -5163,6 +5126,27 @@ mod tests {
});
}
#[gpui::test]
fn test_move_line_up_down_with_blocks(cx: &mut gpui::MutableAppContext) {
let settings = EditorSettings::test(&cx);
let buffer = MultiBuffer::build_simple(&sample_text(10, 5, 'a'), cx);
let (_, editor) =
cx.add_window(Default::default(), |cx| build_editor(buffer, settings, cx));
editor.update(cx, |editor, cx| {
editor.insert_blocks(
[BlockProperties {
position: Point::new(2, 0),
disposition: BlockDisposition::Below,
height: 1,
render: Arc::new(|_| Empty::new().boxed()),
}],
cx,
);
editor.select_ranges([Point::new(2, 0)..Point::new(2, 0)], None, cx);
editor.move_line_down(&MoveLineDown, cx);
});
}
#[gpui::test]
fn test_clipboard(cx: &mut gpui::MutableAppContext) {
let buffer = MultiBuffer::build_simple("one✅ two three four five six ", cx);

82
crates/editor/src/element.rs
View file

@ -1,7 +1,7 @@
use super::{
display_map::{BlockContext, ToDisplayPoint},
DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle, Input, Scroll,
Select, SelectPhase, SoftWrap, ToPoint, MAX_LINE_LEN,
Anchor, DisplayPoint, Editor, EditorMode, EditorSettings, EditorSnapshot, EditorStyle, Input,
Scroll, Select, SelectPhase, SoftWrap, ToPoint, MAX_LINE_LEN,
};
use clock::ReplicaId;
use collections::{BTreeMap, HashMap};
@ -19,7 +19,7 @@ use gpui::{
MutableAppContext, PaintContext, Quad, Scene, SizeConstraint, ViewContext, WeakViewHandle,
};
use json::json;
use language::Chunk;
use language::{Bias, Chunk};
use smallvec::SmallVec;
use std::{
cmp::{self, Ordering},
@ -731,28 +731,70 @@ impl Element for EditorElement {
let scroll_top = scroll_position.y() * line_height;
let end_row = ((scroll_top + size.y()) / line_height).ceil() as u32 + 1; // Add 1 to ensure selections bleed off screen
let start_anchor = if start_row == 0 {
Anchor::min()
} else {
snapshot
.buffer_snapshot
.anchor_before(DisplayPoint::new(start_row, 0).to_offset(&snapshot, Bias::Left))
};
let end_anchor = if end_row > snapshot.max_point().row() {
Anchor::max()
} else {
snapshot
.buffer_snapshot
.anchor_before(DisplayPoint::new(end_row, 0).to_offset(&snapshot, Bias::Right))
};
let mut selections = HashMap::default();
let mut active_rows = BTreeMap::new();
let mut highlighted_row = None;
let selections = self.update_view(cx.app, |view, cx| {
self.update_view(cx.app, |view, cx| {
highlighted_row = view.highlighted_row();
let selections = view.visible_selections(start_row..end_row, cx);
for (replica_id, selections) in &selections {
if *replica_id == view.replica_id(cx) {
for selection in selections {
let is_empty = selection.start == selection.end;
let selection_start = snapshot.prev_row_boundary(selection.start).0;
let selection_end = snapshot.next_row_boundary(selection.end).0;
for row in cmp::max(selection_start.row(), start_row)
..=cmp::min(selection_end.row(), end_row)
{
let contains_non_empty_selection =
active_rows.entry(row).or_insert(!is_empty);
*contains_non_empty_selection |= !is_empty;
}
}
let display_map = view.display_map.update(cx, |map, cx| map.snapshot(cx));
let local_selections = view
.local_selections_in_range(start_anchor.clone()..end_anchor.clone(), &display_map);
for selection in &local_selections {
let is_empty = selection.start == selection.end;
let selection_start = snapshot.prev_line_boundary(selection.start).1;
let selection_end = snapshot.next_line_boundary(selection.end).1;
for row in cmp::max(selection_start.row(), start_row)
..=cmp::min(selection_end.row(), end_row)
{
let contains_non_empty_selection = active_rows.entry(row).or_insert(!is_empty);
*contains_non_empty_selection |= !is_empty;
}
}
selections
selections.insert(
view.replica_id(cx),
local_selections
.into_iter()
.map(|selection| crate::Selection {
id: selection.id,
goal: selection.goal,
reversed: selection.reversed,
start: selection.start.to_display_point(&display_map),
end: selection.end.to_display_point(&display_map),
})
.collect(),
);
for (replica_id, selection) in display_map
.buffer_snapshot
.remote_selections_in_range(&(start_anchor..end_anchor))
{
selections
.entry(replica_id)
.or_insert(Vec::new())
.push(crate::Selection {
id: selection.id,
goal: selection.goal,
reversed: selection.reversed,
start: selection.start.to_display_point(&display_map),
end: selection.end.to_display_point(&display_map),
});
}
});
let line_number_layouts = self.layout_rows(start_row..end_row, &active_rows, &snapshot, cx);

23
crates/editor/src/multi_buffer.rs
View file

@ -1395,6 +1395,23 @@ impl MultiBufferSnapshot {
panic!("excerpt not found");
}
pub fn range_contains_excerpt_boundary<T: ToOffset>(&self, range: Range<T>) -> bool {
let start = range.start.to_offset(self);
let end = range.end.to_offset(self);
let mut cursor = self.excerpts.cursor::<(usize, Option<&ExcerptId>)>();
cursor.seek(&start, Bias::Right, &());
let start_id = cursor
.item()
.or_else(|| cursor.prev_item())
.map(|excerpt| &excerpt.id);
cursor.seek_forward(&end, Bias::Right, &());
let end_id = cursor
.item()
.or_else(|| cursor.prev_item())
.map(|excerpt| &excerpt.id);
start_id != end_id
}
pub fn parse_count(&self) -> usize {
self.parse_count
}
@ -2158,6 +2175,12 @@ mod tests {
);
assert_eq!(snapshot.buffer_rows(4).collect::<Vec<_>>(), [Some(3)]);
assert_eq!(snapshot.buffer_rows(5).collect::<Vec<_>>(), []);
assert!(!snapshot.range_contains_excerpt_boundary(Point::new(1, 0)..Point::new(1, 5)));
assert!(snapshot.range_contains_excerpt_boundary(Point::new(1, 0)..Point::new(2, 0)));
assert!(snapshot.range_contains_excerpt_boundary(Point::new(1, 0)..Point::new(4, 0)));
assert!(!snapshot.range_contains_excerpt_boundary(Point::new(2, 0)..Point::new(3, 0)));
assert!(!snapshot.range_contains_excerpt_boundary(Point::new(4, 0)..Point::new(4, 2)));
assert!(!snapshot.range_contains_excerpt_boundary(Point::new(4, 2)..Point::new(4, 2)));
buffer_1.update(cx, |buffer, cx| {
buffer.edit(

6
crates/text/src/rope.rs
View file

@ -565,6 +565,12 @@ impl Chunk {
if ch == '\n' {
point.row += 1;
if point.row > target.row {
panic!(
"point {:?} is beyond the end of a line with length {}",
target, point.column
);
}
point.column = 0;
} else {
point.column += ch.len_utf8() as u32;